Perlin Worms isn't working

[Fast_Duck]

Please help me fix my Perlin Worms

local Workspace = game:GetService("Workspace")

local blockSize = 4
local seed = math.random(1, 99999999)
local newBlockPositions = {
	
}

for i = -blockSize, blockSize, blockSize do
	for ii = -blockSize, blockSize, blockSize do
		for iii = -blockSize, blockSize, blockSize do
			table.insert(newBlockPositions, Vector3.new(i, ii, iii))
		end
	end
end

local function newBlock(position)
	local block = Instance.new("Part")
	block.Position = position
	block.Size = Vector3.new(blockSize, blockSize, blockSize)
	block.Anchored = true
	block.Parent = Workspace
	
	return block
end

local lastBlock = newBlock(Vector3.new(0, 0, 0))

local res = {}

for index = 1, 100, 1 do
	local xNoise = math.round((math.noise(lastBlock.Position.Y / 10, lastBlock.Position.Z / 10, seed) * 10 + 5) / 10 * 3 - 1.5) * 4
	
	local yNoise = math.round((math.noise(lastBlock.Position.X / 10, lastBlock.Position.Z / 10, seed) * 10 + 5) / 10 * 3 - 1.5) * 4
	
	local zNoise = math.round((math.noise(lastBlock.Position.X / 10, lastBlock.Position.Y / 10, seed) * 10 + 5) / 10 * 3 - 1.5) * 4
	
	local newBlock = newBlock(Vector3.new(
		lastBlock.Position.X + xNoise,
		lastBlock.Position.Y + yNoise,
		lastBlock.Position.Z + zNoise
		)
	)
	
	lastBlock = newBlock
end

[legendaryjimmy12]

How is it not working? I am confused.

[greenboo5]

Perlin worms work by using noise to adjust their rotation and marching forward. Your code is only considering positions.
Also, your noise values are 0 because you are rounding them (math.noise always returns a decimal between -1 and 1), another odd thing is if you give math.noise only integers it ALWAYS returns 0 math.noise(45217, 247, 21) == 0

Here’s the results of my adjustments:

The code

local Workspace = game:GetService("Workspace")

local blockSize = 4
local seed = math.random(1, 99999999)

local function newBlock(position)
	local block = Instance.new("Part")
	block.Position = position
	block.Size = Vector3.new(blockSize, blockSize, blockSize)
	block.Anchored = true
	block.Parent = Workspace

	return block
end

local lastBlock = newBlock(Vector3.new(0, 0, 0))

local cf = CFrame.new(0, 0, 0) -- The starting position & rotation of the worm.
local marchDistance = 4 -- How far worm traverses forward per step
local noiseFrequency = 0.07 -- Larger makes the worm straighter, smaller makes it more curly
local rotationStrength = 0.8 -- How sharp turns can be

for index = 1, 100, 1 do
	local newBlock = newBlock(cf.Position)
	
	-- Generate noise values.
	-- Arbitrary decimals help avoid getting all integers + extra randomness
	local xNoise = math.noise((cf.Y + 2313.682) * noiseFrequency, (cf.Z + 6721.123) * noiseFrequency, seed)
	local yNoise = math.noise((cf.X + 4432.572) * noiseFrequency, (cf.Z - 8742.941) * noiseFrequency, seed)
	local zNoise = math.noise((cf.X - 5472.377) * noiseFrequency, (cf.Y - 1049.189) * noiseFrequency, seed)
	
	-- Rotate worms head based on noise, and march forward.
	cf *= CFrame.Angles(
		xNoise * rotationStrength,
		yNoise * rotationStrength,
		zNoise * rotationStrength
	)
	cf += cf.LookVector * marchDistance

	lastBlock = newBlock
end